Elon Musk moved a step forward in his vision for the future of public transportation, announcing that his Boring Co.\u2019s hyperloop test tunnel will open in less than two months. \u201cThe first tunnel is almost done,\u201d Musk said on his official Twitter account. \u201cOpens Dec 10.\u201d Elon Musk @elonmusk Opens Dec 10 While the trial tunnel - which begins on the site of Musk\u2019s rocket company SpaceX in Hawthorne, California - injects a dose of realism to his vision of a hyper-fast underground system, key questions remain. It\u2019s unclear how Musk will achieve the top speeds of 760 miles (1,220 kilometers) per hour he has touted for a hyperloop tunnel, and the mode of transport that will be used there. Elon Musk @elonmusk Replying to Everyday Astronaut@Erdayastronaut Opening event that night & free rides for the public next day The trial tunnel will have a top speed of 155 miles per hour, according to the billionaire-entrepreneur, surpassing the 125 mph traveled by an electric sled in a video of a test run posted in May last year. Festivities to mark the occasion include an opening event on the night of Dec. 10 and free rides for the public the next day, Musk tweeted. Boring Co. said in August that it was hosting tours of the tunnel site for schools in L.A. County, accommodating as many as 30 students each time. The company is also working on other projects including a Dugout Loop in Los Angeles to transport baseball fans directly to Dodger Stadium, and an express service from O\u2019Hare airport to downtown Chicago.